+ split file extension from descriptive text of file format to avoid that invalid translation breaks file dialog

+ add method to make image view unclosable for user
+ fix possible crash in MeshAlgorithm::GetMeshBorder
+ fix possible crash in MeshAlgorithm::ConnectLines

src/Gui/ReportView.cpp

@@ -433,7 +433,8 @@ void ReportOutput::contextMenuEvent ( QContextMenuEvent * e )
 
 void ReportOutput::onSaveAs()
 {
-    QString fn = QFileDialog::getSaveFileName(this, tr("Save Report Output"), QString(), tr("Plain Text Files (*.txt *.log)"));
+    QString fn = QFileDialog::getSaveFileName(this, tr("Save Report Output"), QString(),
+        QString::fromLatin1("%1 (*.txt *.log)").arg(tr("Plain Text Files")));
     if (!fn.isEmpty()) {
         QFileInfo fi(fn);
         if (fi.completeSuffix().isEmpty())